Abacus is made of wood: Math practice is more effective; using an abacus to calculate math skills is a great way to teach them counting and computational intelligence. Makes math practice more effective: Great for quick calculations. Abacus: A counting system used before the advent of modern numbers is still used by some merchants, traders and clerks. Lightweight and portable: Calculations can be performed anytime, anywhere. Using an abacus as a math teaching tool can make math practice more effective, is a good way to teach calculation, and makes learning much easier.